Are these tyres too big?

[J Henderson]

ISF wheels are also 8" wide and +45, but they actually need a 5mm spacer to clear the front IS350 brakes due to them having less backspacing than an OEM 18" wheel.

Backspace is the physical real estate between the mating surface of the wheel and the spokes. ie: where the caliper is going to be.

You would have to work out how much space is required for a wheel to clear a GS caliper. I don't know what that is offhand, but I'm sure the answer wouldn't be hard to find since it's a fairly common upgrade.

Then, you would have to measure the wheels you plan to buy and see if there's going to be enough room.

[Lex_utor]

1 hour ago, J Henderson said:

ISF wheels are also 8" wide and +45, but they actually need a 5mm spacer to clear the front IS350 brakes due to them having less backspacing than an OEM 18" wheel.

Backspace is the physical real estate between the mating surface of the wheel and the spokes. ie: where the caliper is going to be.

You would have to work out how much space is required for a wheel to clear a GS caliper. I don't know what that is offhand, but I'm sure the answer wouldn't be hard to find since it's a fairly common upgrade.

Then, you would have to measure the wheels you plan to buy and see if there's going to be enough room.

Thanks.

I see. But potentially a spacer could solve the problem if there is one?

And do I need to worry if it will clear the stock brakes?  I would guess not, but...

[J Henderson]

Yeah, a spacer could be used if there's an issue.

[Lex_utor]

Thanks. I picked up the rims today. Hopefuly it will work without much trouble.